Speed Unit Converter

Convert km/h, mph, knots, m/s and Mach speed units.

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How to use

Enter a speed and convert between 6 units.

How fast is 100 km/h in mph?

62.14 mph. Multiply km/h by 0.6214.

What is a knot?

One nautical mile per hour = 1.852 km/h — the standard in aviation and shipping.

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